Installing GRUB

You can ignore Warnings like Attempting to install GRUB to a disk with multiple partition labels. This is not supported yet.., it's normal. But this command needs to run without errors like Installation is impossible. Aborting.

Depending the version of Grub is installed on your system and how it is configured(EFI systems), you can get this error. In this is case you need to find your grub-install flags, grub-install --help may can help you. Or look for another machine to do this step.